Present report deals with the essential oil composition from several Mentha species containing linalool as a major component. The essential oil of M. arvensis grown wild in Kinashibetsu-Hokkaido consisted mainly of （－）-linalool(84.6%), limonene(4.8%), 3-octanol(2.8%), β-caryophyllene(1.0%), germacrene D(1.4%) and the following four components of linalyl acetate, pulegone, menthone and menthol were all undetected. A self-pollinated S1 plant derived from above M. arvensis was composed of linalool (38.4%), limonene (37.5%), (Z)-β-ocimene(1.2%), (E)-β- ocimene (1.0%), β-caryophyllene (5.6%), pulegone (3.0%) and germacrene D(2.7%). The form and the oil of the S1 plant were compared with those of M. gentilis containing linalool as a major component. While, it deals with the oil from M. spicata var. longifolia composed mainly of (＋)-linalool (90.6～91.5%), 1,8-cineole(1.1～1.2%), germacrene D(0.9～1.2%) and linalyl acetate (0.03～0.05%). In addition, MS spectral data of a peak No. 128(0.12～0.45%) was showed to be 13(16), 14-labdien-8-ol as a characteristic component in this species
